JPS63305832A - Electromotive suction device for floor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION A) Field of Industrial Application The present invention relates to an electric floor suction tool used in a vacuum cleaner.

(Example) Conventional technology Electric floor suction equipment uses an electric motor to drive a rotating brush to stir up dust, and the motor must be cooled to prevent it from overheating. Therefore, in Japanese Utility Model Application Publication No. 56-9649, an on-off valve biased by a spring or the like is arranged on the rear wall or side wall of a rotating brush chamber containing a rotating brush, and when the negative pressure inside the rotating brush chamber becomes high, the on-off valve is closed. An electric floor suction device is disclosed, which is configured to open and suck exhaust air from a commutator motor.

However, according to this prior art, the on-off valve is disposed on the rear wall or side wall of the rotating brush chamber, so fine dust such as sand and dust flows through the opened on-off valve to the electric wj machine due to the rotation of the rotating brush. There is a risk that the electric motor may break down, and the opening/closing valve must be configured to open when there is negative pressure, which increases the number of parts used and increases manufacturing costs.

C] Problems to be Solved by the Invention The present invention has a simple configuration that prevents fine dust scraped up by a rotating brush from entering the electric motor, and also provides sufficient cooling for the electric motor. The device is designed to provide a suction tool for use.

2) Means for Solving Problems As shown in FIGS. 1 to 4, the structure of the electric floor suction tool of the present invention is as follows:
1) Place the rotating brush (5) and the brush +5) inside the belt α.
In a device in which a motor (7) that rotates via υ is disposed, and a connecting tube (1 to 1) to the vacuum cleaner suction hose is rotatably pivoted to the rear of the main body case (1), the main body case ( In 1), nine air holes (24a) are provided to supply cooling air to the electric motor 17), and at the rotation axis of the connecting tube (2), the cooling air after passing through the electric motor 771 is connected to the connecting tube (2). It is characterized in that it is provided with an exhaust hole (21a) leading to the exhaust gas. The electric motor (7) is connected to the main body case (
1) A configuration in which the connection tube (2) is housed in the side of the rear connecting tube pivot joint portion, and the connecting tube (2) communicates with the suction port 14), and the exhaust hole (21i1) does not directly oppose the suction port +4+. It is. Further, on the opposite side of the housing position of the electric motor 17 with respect to the connecting cylinder pivot joint at the rear of the main body case (1), there is a printed circuit board (on which electronic components such as a resistor (9a) for controlling the electric motor 171 are mounted). 9) is housed in the main body case (1), and a second air hole (24b) is provided in the main body case (1), and a @2 exhaust hole (21b) is provided in the rotation axis of the connecting tube (15).

E) Function When the vacuum cleaner is operated, the electric motor 1 (17) rotates, the rotating brush (5) rotates, scrapes up dust on the floor, and sucks it into the vacuum cleaner via the connection tube (c). It will be done. here,
The electric motor 171 and the printed circuit board (9) have air holes (2
1) and the cooling air supplied from the second air hole (24b), and the cooling air that has cooled the vacuum cleaner 17) and the printed circuit board (9) is sucked into the vacuum cleaner from the suction port 14). As the negative pressure inside the connecting tube (19) increases,
The air is sucked into the connecting tube q9 through the exhaust hole (21a) and the second exhaust hole (21b), and is led to the vacuum cleaner together with the suction airflow. In addition, since the exhaust hole (21a) and the first second exhaust hole (21b) do not face the suction port 14), fine dust such as sand and dust scattered by the rotation of the rotating brush (5) may be removed from the motor ζ7) side. It will not get into the printed circuit board (9) side.

(f) Example The structure of the electric floor suction tool of the present invention will be explained below based on a specific example shown in FIGS. 1 to 4.

(1) is a main body case in the shape of an oblong housing formed by connecting an upper case 12) and a lower case (3);
1) has a horizontally elongated suction port (4) on the lower surface, and forms a brush chamber (6) in which a rotary brush (5) is rotatably supported, and a commutator-handled electric motor 17 is provided in the rear part. ) and a resistor (9a) that controls the motor 171.
A board chamber (Iω) for accommodating a printed circuit board (9) on which electronic components such as
) A belt chamber 0 is formed in which the belt transmitting signal (fil) is stored, and the motor chamber (8) and the board chamber +
1α, there is formed a connecting cylinder pivot attachment portion (13) which communicates with the suction port 14) via a pivot attachment side wall (141f141).

(151 is a connection tube that connects to the suction hose (not shown) of a vacuum cleaner, and the front part is open (1e).
'7) and a vent pipe (18) rotatably pivoted in the left-right direction to the pivot body 0'71.
) are provided with left and right hollow shafts (2,0b) (20a) protruding from the central rotation axes of the left and right sides (19b) (19B), and the right and left hollow shafts (20a) @H20
b) The hollow part is connected to the exhaust hole (21) and the second exhaust hole (21b).
). The left and right hollow shafts (20b) (
20a) into the bearing hole of the pivot side wall (14) Q41
The connecting tube 09 is rotatably pivotally mounted to the main body case (1) by being rotatably loosely inserted and pivoted in the vertical direction. The connection tube (151 is the motor room (8))
and the substrate chamber 0.0) through the exhaust hole (21a).
and are in communication with each other via the second exhaust hole (21b).

(24a) and (24b) are air holes and second air holes bored in the shape of slits in the rear side wall of the motor chamber 17) and the rear side wall of the board chamber tlO of the lower case (3); This is for supplying cooling air into the substrate chamber dω and into the substrate chamber dω. Further, (c) is a power supply cord to the board (9), and the motherboard is a power supply terminal provided at the vent pipe U mark.

After connecting the electric floor suction tool to the suction hose of the vacuum cleaner with the above configuration, when the vacuum cleaner is operated, power is supplied to the electric vacuum cleaner (7) via the printed circuit board (9), and the rotating brush ( 5) rotates and scrapes up the dust on the floor. The dust thus stirred up is sucked into the vacuum cleaner through the connecting tube together with the suction airflow, and the negative pressure inside the connecting tube increases due to the suction airflow. For this reason, the air hole (21a)
And electricity from the second air hole (21b)! The cooling air that entered the IJ rear chamber (8) and the board chamber uO1 cools the cabinet wJ&+71 and the printed circuit board (9), and then the exhaust hole (24&) and! Exhaust from the 2 exhaust hole (24b) into the connecting tube (to),
It is sucked into the vacuum cleaner along with the suction airflow. At this time, the exhaust hole (21a) and the second exhaust hole (21b) are connected to the brush chamber (
6) and not facing the exhaust hole (21a) (2).
Since there is a flow of cooling air flowing into the connection tube (151) from 1b), fine dust such as sand and dust scattered by the rotation of the rotating brush 5) will also flow into the electric VJ machine room (8) or the board room U.
■It does not get in, so the electric wj machine (7) does not break down due to fine dust, and the printed circuit board (9)
There is no possibility that the cooling efficiency will decrease due to dirt from fine dust.

g) Effects of the Invention According to the present invention, the cooling air of the motor flows into the main body case from the air hole, passes through the recovery VJ machine while cooling it, and is exhausted into the connection cylinder from the exhaust hole of the connection cylinder. Since it is exposed to the vacuum cleaner along with the suction airflow from the suction port, the electric tuJ sulfur can be reliably cooled with a simple configuration and overheating accidents can be prevented.

In addition, since the exhaust hole does not face the rotating brush, fine dust particles do not enter the electric cutter side due to the rotation of the rotating brush, and failure of the electric wJiIA due to fine dust does not occur. Furthermore, since the exhaust hole has a simple structure, which is just a careful arrangement in the front of the connecting tube, the number of parts used does not increase, and the manufacturing cost does not increase.

Therefore, it is possible to obtain an electric floor storage device that has excellent cooling efficiency over a long period of time, is free from motor failures, and can be manufactured at low cost.

[Brief explanation of drawings]

Fig. 1 is a partially sectional top view of the inventive electric 1 floor suction device excluding the upper case, Fig. 2 is a sectional view taken along line A-A in Fig. 1, Fig. 6 is a perspective view of the same, and Fig. 4. is a sectional view of a part of the connecting tube. (1)...Body case, +4)...Suction port, (5)
...Rotating brush, +71...Electric motor, (9)...
Printed circuit board, (2111)...Exhaust hole, (2411
)...Air hole.

Claims (1)

[Claims] (1) A rotary brush and an electric motor that rotates the brush via a belt are disposed in the main case that has a suction port on the bottom surface, and a connecting tube to the vacuum cleaner suction hose is rotatable at the rear of the main case. The main body case is provided with an air hole for supplying cooling air to the electric motor, and the rotation axis of the connecting tube is provided with an air hole for supplying cooling air after passing through the electric motor to the connecting tube. An electric floor suction device characterized by being equipped with an exhaust hole that leads to a cylinder.